Chapter 5: Coordination Chemistry — Online MCQ Test
CHEMISTRY · CLASS 12th · Tamil Nadu State Board
Practice Chapter 5: Coordination Chemistry with a free chapter-wise online MCQ test.
This chapter covers: This chapter introduces coordination compounds ligands coordination numbers and IUPAC nomenclature. It covers Werner theory valence bond theory crystal field splitting and isomeris....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 5: Coordination Chemistry — Important Questions & Answers
What is the coordination number of the central metal ion in the complex [Co(NH3)6]3+ ?
- A. 3
- B. 4
- C. 6
- D. 2
Answer: C. 6
There are six ammonia ligands directly bonded to cobalt. Hence, the coordination number is 6.
There are six ammonia ligands directly bonded to cobalt. Hence, the coordination number is 6.
Which of the following is a neutral ligand?
- A. Cl−
- B. NH3
- C. CN−
- D. OH−
Answer: B. NH3
Ammonia (NH3) is a neutral ligand because it does not carry a charge.
Ammonia (NH3) is a neutral ligand because it does not carry a charge.
Which statement best describes Werner’s theory?
- A. Metal ions form only ionic bonds with ligands
- B. Primary valence is ionisable and secondary valence is non-ionisable
- C. Coordination compounds cannot show isomerism
- D. Ligands are always negatively charged
Answer: B. Primary valence is ionisable and secondary valence is non-ionisable
Werner proposed that primary valence corresponds to oxidation state and is ionisable, while secondary valence corresponds to coordination number and is non-ionisable.
Werner proposed that primary valence corresponds to oxidation state and is ionisable, while secondary valence corresponds to coordination number and is non-ionisable.
Which complex will have the highest crystal field splitting energy (Δo) among the following?
- A. [Ti(H2O)6]3+
- B. [Fe(H2O)6]2+
- C. [Co(H2O)6]2+
- D. [Ni(H2O)6]2+
Answer: C. [Co(H2O)6]2+
For the same ligand, crystal field splitting generally increases with higher charge and smaller ionic radius of the metal ion. Co2+ gives a larger splitting than the others listed here.
For the same ligand, crystal field splitting generally increases with higher charge and smaller ionic radius of the metal ion. Co2+ gives a larger splitting than the others listed here.
Which complex is most likely to violate the simple valence bond theory prediction of magnetic behavior?
- A. [FeF6]3−
- B. [Fe(CN)6]3−
- C. [CoF6]3−
- D. [NiCl4]2−
Answer: A. [FeF6]3−
[FeF6]3− contains Fe(III) with weak-field fluoride ligands and is high-spin paramagnetic. It is commonly used in questions involving magnetic properties and crystal field considerations.
[FeF6]3− contains Fe(III) with weak-field fluoride ligands and is high-spin paramagnetic. It is commonly used in questions involving magnetic properties and crystal field considerations.